U.S. Sen. Catherine Cortez Masto, D-Nev., joined 45 other senators asking President Donald Trump to veto a bill allowing internet service providers to sell the personal information of customers.

The bill, sponsored by Republican U.S. Sen. Dean Heller and supported by U.S. Rep. Mark Amodei, rolls back Federal Communications Commission rules implemented under President Barack Obama’s administration that prevent internet providers from selling data about their users without consent.

Privacy advocates have called on the president to veto the legislation while internet service providers say it levels the field with companies like Google and Facebook.

A spokeswoman for Heller said the bill does not strip online privacy from users, but protected them from the implementation of one that would've restricted access.

“Despite widespread misinformation, the Senate did not strip consumers of their online privacy protections," said Megan Taylor, Heller's spokeswoman. "In fact, Nevadans’ privacy is just as protected today as it was last month. Instead, the Senate blocked implementation of a rule that would harm the openness and access to the Internet that Nevadans enjoy today. A free and open Internet is essential to America’s competitiveness and democracy, and that’s why Senator Heller voted to stop a rule that would have a direct negative impact on Nevadans’ use of the Internet.”

Forty-six of 48 Democratic senators sent the letter to Trump on Thursday asking him to veto the measure.

The letter:

Dear Mr. President:

We write today to urge a swift veto of S.J.Res. 34, a resolution that would rescind the Federal Communications Commission (FCC) broadband privacy rules. This legislation will seriously undermine the privacy protections of the overwhelming majority of Americans who believe that their private information should be just that – private – and not for sale without their knowledge.

The rules that this legislation would undo were enacted by the FCC in order to prohibit internet service providers (ISPs) from selling or sharing the sensitive personal data of their customers without first obtaining consent. The data protected under the rule includes information such as one’s social security number, email contents, web browsing history, precise geo-location, application usage, data about consumer’s health and finances, and even data about their children. In deeming this sort of information as sensitive, and requiring explicit opt-in consent before it can be shared, the FCC sent a clear message that the choice should be in the hands of consumers – not the broadband providers.

The FCC’s rules were finalized following a lengthy and transparent rulemaking process where members of the public were able to review the rules and submitted more than 250,000 comments, letters, and filings. S.J.Res. 34, which the Republicans hastily pushed through in the past few days, will not only undo this transparent process, it will prevent the FCC from ever reinstating similar consumer privacy protections in the future. As a result, broadband providers have free rein to share user data without first receiving consent or even notifying consumers.

Reversing these landmark privacy protections would be the antithesis of a pro-consumer Administration. Accordingly, we respectfully urge you to veto S.J.Res. 34 and make sure that the broadband privacy protections stay intact. Consumers deserve the right to make their own decisions about access, use, and sale of their personal, sensitive internet data by their broadband provider.